The Ebyte E70-900T14S2 is a high-precision, Sub-GHz wireless serial port module based on the Texas Instruments CC1310 SoC, operating in the 861-922.5MHz frequency band with a 1.5km communication range, featuring industrial-grade low-temperature drift crystal oscillators and advanced air-wakeup functionality for low-power IoT sensing.
| Parameter | Specification |
|---|---|
| RF IC | TI CC1310 |
| Frequency Band | 861 to 922.5 MHz |
| Transmit Power | 14 dBm |
| Communication Distance | 1.5 km |
| Interface | UART (TTL level) |
| Operating Temperature | -40 to 85 degrees Celsius |
| Dimensions | 14 x 20 mm |
| Main parameter | Performance |
Remark |
| Distance for reference |
1500m |
Test condition：clear and open area, antenna gain: 5dBi,antenna height: 2.5m，air data rate: 2.5kbps |
| TX length |
Transmission mode specification |
See transmission mode for details |
| Buffer |
2048 Btye |
- |
| Modulation |
GFSK |
- |
| Communication interface |
UART |
- |
| Package |
SMD |
- |
| Connector |
Stamp hole |
Spacing of 1.27 mm |
| Size |
14*20 mm |
- |
| Antenna |
IPEX/Stamp hole |
50 ohm impedance |
| Main parameter | Min. | Typ. | Max. | Unit | Remark |
| Operating voltage |
2.2 |
3.3 | 3.8 | V | ≥3.3V ensures output power |
| Communication level | - | 3.3 |
- | V |
For 5V TTL, it may be at risk of burning down |
| Operating temperature |
-40 |
- | +85 |
℃ |
Industrial design |
| Operating frequency |
861 |
- | 922.5 |
MHz |
Support ISM band |
| Transmitting current |
- | 36 | - | mA |
Instant power consumption |
| Receiving current |
- | 8 | - | mA |
- |
| Turn-off current |
- | 1.2 | - | μA |
Software is shut down |
| Max Tx power |
13.6 | 14 | 15.3 | dBm |
- |
| Receiving sensitivity |
-107 | -108 |
-109 | dBm |
Air data rate is 2.5kbps |
| Air data rate |
2.5k |
2.5k |
168k |
bps |
Controlled via user’s programming |
Practical Application Scenarios
1. Smart Grid and Advanced Metering Infrastructure (AMI)
The CC1310's ultra-low power consumption and long-range capabilities make the E70-900T14S2 ideal for utility metering. It allows smart meters to transmit consumption data over extended distances with minimal battery drain, ensuring reliable data aggregation in high-density smart grid deployments where traditional Wi-Fi fails to provide sufficient coverage.
2. Industrial Wireless Data Acquisition
Integrated with Ebyte’s industrial DTU or serial server solutions, this module excels in remote data collection from PLCs and sensors across large factory floors. Its "air wakeup" functionality allows the module to remain in deep sleep, waking up only upon receiving a signal, which drastically extends the operational lifespan of battery-powered industrial monitoring nodes.
3. Precision Agriculture and Environmental Monitoring
Deployed in field sensor arrays, the module leverages its Sub-GHz operating band for excellent penetration through foliage and uneven terrain. Farmers use these nodes to aggregate soil moisture and crop health data, maintaining stable links across vast agricultural estates where signal obstacles often degrade performance for 2.4GHz devices.
FAQ Section
1. How does the industrial-grade crystal oscillator improve system performance?
The 24MHz low-temperature drift crystal ensures frequency stability across the -40 to 85 degrees Celsius operating range. This precision is critical for maintaining reliable communication in outdoor environments where fluctuating temperatures would otherwise cause frequency shifts and lead to packet loss in standard consumer-grade modules.
2. Can I use the E70-900T14S2 in a 5V logic system?
The I/O port voltage is strictly 3.3V. While the module is highly robust, connecting directly to a 5V microcontroller will likely exceed the voltage limits of the CC1310 SoC. We strongly recommend using a voltage level shifter or a simple resistor divider circuit for the UART RX/TX lines to prevent permanent hardware damage.
3. Does the module support auto-relay networking for extended coverage?
The E70-900T14S2 is primarily designed as a serial port module, which simplifies development by handling the underlying wireless protocols. If you require complex mesh or auto-relay networking beyond the 1.5km line-of-sight range, we suggest implementing a higher-level network protocol on your host MCU or utilizing our dedicated Ebyte relay-capable gateway modules.
